Nevan

Hi Adam,

Thanks for your quick reply. I realised that what I wanted was to change the other input fields rather than the text fields.

So I used this instead

.forminator-input {
      text-transform: uppercase;
}

and added this to my wp-content/mu-plugin directory.

<?php

add_action('wp_footer', function() {
?>
    <script type="text/javascript">
    jQuery(document).ready(function($) {
        $('#forminator-module-77 input').on('keyup', function() {
            $(this).val($(this).val().toUpperCase());
});
});
</script>
<?php
}, 99 );

and it works! Thanks for your help